Bonjour aidez moi silvouplais :) au deux exercice:)

1)
a) 4x + 4 = 2 (2x + 2)
b) 8x - 8 = 2 (4x - 4)
c) 4 + 2x = 2 (2 + x)
d) 2x - 8 = 2 (x - 4)
e) 9x² - 5x = x (9x - 5)
f) 6x + 9 = 3 (2x + 3)

2)
A = 2(4x - 5) + (5x + 7) - 3(8 + 5x)
A = 8x - 10 + 5x + 7 - 24 - 15x
A = 8x + 5x - 15x - 10 - 24 + 7
A = - 2x - 27

B = 9 (x - 8) - (x² - 3x) - 7 (x - 9)
B = 9x - 72 - x² + 3x - 7x + 63
B = - x² + 9x + 3x - 7x - 72 + 63
B = - x² + 5x - 9

C = - 3 (1 + 4x) - 4 (5x + 8) + x (4x - 7)
C = - 3 + 12x - 20x - 32 + 4x² - 7x
C = 4x² + 12x - 20x - 7x - 3 - 32
C = 4x² - 15x - 35
 
D = - 5 (- 1 + 3x²) - x (5 + x) - 2x (3 - 2x)
D = 5 - 15x² - 5x - x² - 6x + 4x²
D = - 15x² + 4x² - x² - 5x - 6x + 5
D = - 12x² - 11x + 5

1)a) 4x + 4 = 2 (2x + 2)b) 8x - 8 = 2 (4x - 4)c) 4 + 2x = 2 (2 + x)d) 2x - 8 = 2 (x - 4)e) 9x² - 5x = x (9x - 5)f) 6x + 9 = 3 (2x + 3)
2)A = 2(4x - 5) + (5x + 7) - 3(8 + 5x)A = 8x - 10 + 5x + 7 - 24 - 15xA = 8x + 5x - 15x - 10 - 24 + 7A = - 2x - 27
B = 9 (x - 8) - (x² - 3x) - 7 (x - 9)B = 9x - 72 - x² + 3x - 7x + 63B = - x² + 9x + 3x - 7x - 72 + 63B = - x² + 5x - 9
C = - 3 (1 + 4x) - 4 (5x + 8) + x (4x - 7)C = - 3 + 12x - 20x - 32 + 4x² - 7xC = 4x² + 12x - 20x - 7x - 3 - 32C = 4x² - 15x - 35 D = - 5 (- 1 + 3x²) - x (5 + x) - 2x (3 - 2x)D = 5 - 15x² - 5x - x² - 6x + 4x²D = - 15x² + 4x² - x² - 5x - 6x + 5D = - 12x² - 11x + 5